add a build option: ENABLE_DUMB_DONGLE

Author: z4yx

CMakeLists.txt

@@ -5,6 +5,7 @@ project(canokey-core C)
 option(ENABLE_TESTS "Perform unit tests after build" OFF)
 option(ENABLE_FUZZING "Build for fuzzing" OFF)
 option(ENABLE_DEBUG_OUTPUT "Print debug messages" ON)
+option(ENABLE_DUMB_DONGLE "Skip all user-presence test (USE AT YOUR OWN RISK)" OFF)
 option(VIRTCARD "Virt Card" OFF)
 
 set(CMAKE_C_STANDARD 11)
@@ -21,6 +22,9 @@ if (ENABLE_TESTS OR ENABLE_FUZZING)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fstack-usage")
     endif ()
 endif ()
+if (ENABLE_DUMB_DONGLE)
+    add_definitions(-DDUMB_DONGLE)
+endif (ENABLE_DUMB_DONGLE)
 
 add_subdirectory(canokey-crypto EXCLUDE_FROM_ALL)
 

src/device.c

@@ -66,6 +66,9 @@ uint8_t wait_for_user_presence(uint8_t entry) {
   uint32_t last = start;
   DBG_MSG("start %u\n", start);
   while (get_touch_result() == TOUCH_NO) {
+#ifdef DUMB_DONGLE
+    break;
+#endif
     // Keep blinking, in case other applet stops it 
     start_blinking(0);
     // Nested CCID processing is not allowed
@@ -102,6 +105,9 @@ int send_keepalive_during_processing(uint8_t entry) {
 }
 
 __attribute__((weak)) int strong_user_presence_test(void) {
+#ifdef DUMB_DONGLE
+  return 0;
+#endif
   for (int i = 0; i < 5; i++) {
     const uint8_t wait_sec = 2;
     start_blinking_interval(wait_sec, (i & 1) ? 200 : 50);